Simulation method for milling by use of dynamic position error

A simulation method for milling by use of a dynamic position error, applicable to connect a machine tool, the machine tool further connecting an electromechanical analysis module, the simulation method comprising the steps of:

• (a) generating a milling surface from a numerical control code, the milling surface having a plurality of grid points, the numerical control code having a position command;
• (b) calculating a normal vector for each of the plurality of grid points on the milling surface;
• (c) feeding back a position feedback of each of the plurality of grid points by the electromechanical analysis module, and deriving a corresponding three-axis dynamic position error of the milling surface according to the position command and the position feedback;
• (d) calculating a component of the normal vector for the three-axis dynamic position error so as to obtain a normal-vector error value of the corresponding grid point;
• and
• (e) displaying undercutting information of the normal-vector error value of the corresponding grid point on the milling surface;
• wherein the step (d) includes a step of applying dot product to produce the three-axis dynamic position error and the normal vector of the corresponding grid point on the milling surface.